[DrumYum]

What's the difference between registerGroup and registerChildGroup?
And why BeforeCheck don't works in code like this?

Код:

mainCommandGroup = new CommandGroup();
adminCommandGroup = new CommandGroup();
		
mainCommandGroup.registerCommands(new TDMCommands(playerLifecycleHolder));
adminCommandGroup.registerCommands(new AdminCommands(playerLifecycleHolder));
		
commandManager.registerGroup(mainCommandGroup);
commandManager.registerGroup(adminCommandGroup);